Before scientists learned how to make a synthetic growth

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Before **scientists learned how to make a synthetic growth hormone, removing it painstakingly** in small amounts from the pituitary glands of human cadavers.A. scientists learned how to make a synthetic growth hormone, removing it painstakinglyB. scientists had learned about making a synthetic growth hormone, they had to remove it painstakinglyC. scientist learned how to synthesize the growth hormone, it had to be painstakingly removedD. learning how to make a synthetic growth hormone, scientists had to remove it painstakinglyE. Learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists

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4 Answers

Ambuj ahuja

21 points Registered user

1

C, verb tenses. First removed and then learned. Past perfect is imperative. Though I think it would also be correct without a "had" as "before " is mentioned to explain the timeline. Do correct me if I am wrong.

CLeflore

1 point Registered user

0

A synthetic stuff cannot come from a natural source, i.e human cadavers. This consideration eliminates choices A, B, and D. And choice E is nonsensical as the modifier before the comma that modifies "it" (which is placed immediately after the comma) suggests that 'it', which refers to the hormone itself, learned how to make the hormone.

CHarricks

-1 points Registered user

0

A synthetic stuff cannot come from a natural source, i.e human cadavers. This consideration eliminates choices A, B, and D. And choice E is nonsensical as the modifier before the comma that modifies "it" (which is placed immediately after the comma) suggests that 'it', which refers to the hormone itself, learned how to make the hormone.

info@wolframalpha.com

1 point Registered user

0

C, verb tenses. First removed and then learned. Past perfect is imperative. Though I think it would also be correct without a "had" as "before " is mentioned to explain the timeline. Do correct me if I am wrong.